Adsorbate induced neutralization effects in low energy alkali and inert gas ion scattering

S. H. Overbury, B. M. Dekoven, Peter C Stair

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The dissociative adsorption of oxygen on Mo(001) has been studied using low energy (500-1000 eV) Li+, K+ and He+ ion scattering. Oxygen adsorption affects the energy and angular distributions of scattered ions, and also the intensity of scattered ions changes in a manner which is dependent upon the type of ion used. The scattered ion intensities are examined as a function of oxygen exposure and compared for each type of ion for the same surface structure and under identical scattering geometry. The He+ intensity drops very sharply with increasing oxygen exposure, decreasing by a factor of 10 with ≤ 2 L exposure for all azimuthal angles of incidence. The Li+ intensity in all azimuths exhibits an initial decrease followed by a large increase and ultimately a decrease again as oxygen exposure increases. The K+ intensity, while decreasing with exposure for incidence in the [100] azimuth, is relatively unaffected by low oxygen exposure in the [110] azimuth. These contrasting dependencies are discussed and explained as manifestations of different neutralization mechanisms occuring in each case.

Original languageEnglish
Pages (from-to)384-390
Number of pages7
JournalNuclear Inst. and Methods in Physics Research, B
Volume2
Issue number1-3
DOIs
Publication statusPublished - 1984

Fingerprint

Noble Gases
Alkalies
ion scattering
Adsorbates
Inert gases
rare gases
alkalies
Scattering
Ions
Oxygen
oxygen
gases
azimuth
ions
energy
incidence
Adsorption
adsorption
Angular distribution
Surface structure

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

Adsorbate induced neutralization effects in low energy alkali and inert gas ion scattering. / Overbury, S. H.; Dekoven, B. M.; Stair, Peter C.

In: Nuclear Inst. and Methods in Physics Research, B, Vol. 2, No. 1-3, 1984, p. 384-390.

Research output: Contribution to journalArticle

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